| Acronym | Meaning |
| TSA | Thermal Swing Adsorption |
| GRGL | Groundwater Residue Guidance Level |
| IHSS | International Humic Substances Society |
| IRED | Ion Radiation-enhanced Diffusion |
| DTS | Diametral Tensile Strength |
| MBE | Many-body Expansion (in Mol. Potential Energy Surface Calcn.) |
| JCBN | IUPAC-IUB Joint Commission On Biochemical Nomenclature |
| ELF | Environmental Load Factor |
| RMRCI | Relativistic MR-CI |
| NTB | Nonorthogonal Tight-binding |